Lock



N. B. HURD LOCK June 27, 1939.

Filed May 15, 1938 INVENTOR flak/144MB. Ill/R0 BY v HQ-W ATTORNEYS Patented June 27, 1939 V I I Q 7 UNITED STATES PATENT OFFICE LOCK Norman B. Hurd, Newington, Conn, assignor to The American Hardware Corporation, New Britain, Conn., a corporation of Connecticut Application May 13, 1938, Serial No. 207,680

8 Claims. (Cl. 292-465) This invention relates to looks of a type parnotch I to receive the nose It of a dogging lever ticularly useful for bathroom doors. ll when the outside knob is to be locked. The The object is to provide a construction wherelever I1 is pivoted intermediate its length in the by when the door is locked on the inside, either case in the region of lug 6. This outside roll- 5 intentionally or unintentionally, it can be unback Misoperated by the spindle l8 of an out- 5 locked from the outside by the use of a special side knob I9. 20 is a spring bearing at one end key in the event the person in the room is inagainst an abutment 2| and at the other end capacitated, or in the event such person is a little against the lower end of lever II. This spring child incapable of understanding how to get out. normally holds this lever in a position in which 10 It is a further object to provide means whereby its do g 11088 is disengaged from the 0 10 if a little child is playing with the door and back H (see Fig. 1). 22 is a roll-back mounted s'hould accidentally dog the roll-back for the outin the as and havin on a nn t d y side knob and then close the door from the ina link 23 with the lower end of the dogging lever side, the latch bolt will remain retracted so that H. The roll-back 22 may be oscillated from inlo thedoor may be freely pushed open from the inside the door by the spindle of a thumb piece 24. 15 side. In the outside wall of the door and in line with Th e nd oth r v pt will b pp the roll-back 22 I provide a hole large enough to to the mechanic skilled in this art from areading permit th d f an emergency key 25 t be 0f the following SDeCification and an a entered so that this roll-back may be actuated tion of the accompanying drawing in which I from the outside in the case of an emergency. 20

have 5 i' m form 0f my inventmn and In this instance this key has a squared end corin "fi h responding substantially in size to the spindle Fig. 1 1s a side elevatlon showing the internal passage in mlhback 21 is a finishing piece lock Parts the cap 1)! the 100k case being or escutcheon for the emergency keyhole. 22'

' 25 molfed; is a second arm on the roll-back 22 and 9 is an 25 2 is a View showmg the part5 extension on the lower end of the latch retracting lever, which extension stands in front of the arm 3 f Section onthe plane of the hue 3-3 22''. 27 is a stop in the lock case against which of f the arm 22' may abut when the roll-back 22 is 30 Fig. 15 a section substantially on the plane swung to its nomdoggmg position (see Fig. 30 of of 1; 2'l' is a stop to check the movement of the arm Fig. 5 1s a side elevation of an emergency key. when swung to its dogging position The arm 1 represents a mmlse lock case, 2 the and 22" is ofiset so that when this roll-back is oscil- 3 the face-plate 4 is latch'bolt' The tail 5 lated this arm will ass freel over the to of the of this latch-boltis provided with a slot which Stop u 28 is a frricuon z which in $1 embraces a lug 6 on the latch case which lug Stance is in the form of a lever. 29 is a pivot acts as the latch and as an abutment therefor. 30 is a. cam on the side of the hub of a latch Spnng 1 whmh is located in said Slot the friction piece 28, said cam facing one edge of its rear end abutting against said lug 6 and its v the latch-bolt tail. 3| is an-oifset shoulder on forward end agamst the end wall of said Slot the other end of the friction piece 28, said shoul- The tail of the latch-bolt at the rear of the lug der overstanding the opposite edge of said latch- 6 1s likewise slotted to rece ve a tenon 8 on the 1 It tan is an ofiset Shoulder or short arm iififirfiini iit "iffitZLiY %JiitZ? i332; at one s of hub 01 the {friction piece. radial arm and m is a spring bearing against The adiacent side of the dogging lever 11 said arm to normally hold the retracting lever 3 Shaped to provide a cam Surface to coact 9 in its inactive position shown in the drawing. with the arm to normally the fflction [I is the usual roll-back mounted the lo k piece free of the latch (See Fig. 1). Wllen case and cooperating with the retracting lever the dogging lever is advanced to the dogging P 9 when it is desired to retract the latch. This sition shown in Fig. 2, i m v s -W y fr the 50 roll-back itself is operated by the spindle 12 of an 30' a pe the friction piece 130 be inside knob l3. I4 is another roll-back also coswung by spring 32 to the position shown in Fig. 2 operating with the-latch retracting lever and wherein the latch tail will be frictionally enmounted in thecap 2 in the usual manner. This gaged by the cam 30 or the shoulder 3|, or both,

/ s roll-back is extended on its front side and has a which friction is sufllcientto prevent the latch, 55

if repressed independently of the retracting lever 8, from being projected by spring I.

Operations-If the parts are in the normal unlocked position shown in Fig. l, the door may be freely opened and closed from either side by tuming one or the other of the knobs lI-l9. Assuming that such a lock is associated with the bathroom door, anyone entering the room and closing the door may throw the dogging means on" and lock it by simply turning the thumb piece 24, thereby dogging the outer knob. The person on the inside may freely leave the room by turning the inside knob. This act simultaneously reverses the position of the roll-back 22, which reverses the dog and restores the parts to the normal unlocked or 011" position shown in Fig. 1. If, perchance, the person within the room should become incapacitated while the door is locked, or

it it should be a little child unable to understand how to escape, the holder of the emergency key may unlock the door by reversing the roll-back 22 and turning the outer knob. If a small child should be playing with a look while the door is open and should inadvertently turn the thumb piece, dogging the outer knob, and should then enter the room and close the door, the closing movement of the door would cause the latch to be repressed by the well known strike-plate (not shown), which latch under such conditions would be held repressed by the piece 28 so that the child could freely push the door open.

I claim:

1. In a door lock having independent means for retracting the latch-bolt from the outside and inside of the door, a case, a spring latch-bolt, means operable from the indoor side for dogging the outside latch retracting means, and means coacting the the latch-bolt for holding it retracted when repressed by means other than the lastmentioned retracting means while the latter is dogged.

2. In a door look, a case, a spring latch-bolt, latch retracting means operable from outer and inner sides of a door, means operable from the indoor side for dogging the outside latch retracting means, and means coacting with the latch bolt for holding it retracted when repressed by means other than the first mentioned retracting means while the latter is dogged, said latch holding means being released by the operation of the indoor latch retracting means.

3. In a door lock having independent means for retracting the latch-bolt from the outside and inside of the door, a case, a spring latch-bolt, a latch retracting lever, a pivoted dogging lever for the outside latch retracting means, with means for operating said dogging lever from the indoor side of the lock, and means coacting with the latch-bolt for holding it retracted when repressed by other means than the latch retracting lever and while the outside operated retracting means is dogged.

4. In a door lock having independent means for retracting the latch-bolt from the outside and inside of the door, a case, a spring lach-bolt, a latch retracting lever, a dog for the outside latch retracting means, with means for operating said dog from the indoor side of the lock, means coacting with the latch-bolt for holding it retracted when repressed by other means than the latch retracting lever and while the outside operated latch retracting means is dogged, said dog having means cooperating with the latch holding means to tree the latch-bolt when the dog is disengaged from the outside latch retracting means.

5. In a door lock having independent means for retracting the latch-bolt from the outside and inside of the door, a case, a spring latch-bolt mounted therein, a latch retracting lever, an outer roll-back coacting with said latch retracting lever and operable from the outside of the door, a dog for holding the outside roll-back from operation when said dog is moved to its on position, another roll-back operable from the indoor side of the lock and connected with said dog to move it to the on or oil" position, a device for f'rictionally engaging and holding the latch-bolt retracted when repressed by other means than the outer roll-back, said latch holding device being released from said latch holding position by and when the first mentioned dog is moved to the oiP position.

6. In a door look, a case, a spring latch-bolt mounted therein, a latch retracting lever, an inner and an outer roll-back coacting independently with said latch retracting lever and independently operated from the opposite sides of a door, a dog for holding the outside roll-back from operation when said dog is moved to the on" position, a third roll-back operable from the indoor side ot the lock for moving said dog to the on" or of! position, a device for engaging and holding the latch-bolt retracted when repressed by other means than the said roll-backs, said latch holding means being released from said latch holding position by and when said dog is moved to the of! position, and said latch holding device being movable to the off position by the latch retracting lever when the inside roll-back is operated'to retract said latch.

'7. In a door lock having independent means for retracting the latch-bolt from the outside and inside oi the door, a case, a spring latch-bolt, manually operable dogging means for preventing at will the retraction oi. said bolt from the outdoor side. and means engaging and holding the latchbolt retracted when repressed independently of the outside latch retracting means while the latter is dogged.

8. In a door lock, a case, a spring latch-bolt, independent means for retracting said latch-bolt from the outside and inside of a door, manually operable dogging means for preventing at will the retraction of said bolt from the outdoor side, means engaging and holding the latch-bolt retracted when repressed independently of the first mentioned latch retracting means while the outside latch retracting means is dogged, said latch holding means being releasable by the operation of the indoor latch retracting means.

NORMAN B. HURD. 

